{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:NUZTNRCUHN75L6GJIAP5GB6EDV","short_pith_number":"pith:NUZTNRCU","canonical_record":{"source":{"id":"2010.04572","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2020-10-09T13:37:45Z","cross_cats_sorted":["physics.comp-ph"],"title_canon_sha256":"22ef0ee7ccb1a2e9fdadcbcd333c080daaa06237032fc3b4c5fc5303ada47cc4","abstract_canon_sha256":"5cbb290c3bc2806e25eceaedab039766609bdc1f598b43d8af9effa7eeaaa04b"},"schema_version":"1.0"},"canonical_sha256":"6d3336c4543b7fd5f8c9401fd307c41d7779323020095a071f41ffa7d5e4eead","source":{"kind":"arxiv","id":"2010.04572","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2010.04572","created_at":"2026-07-05T02:13:51Z"},{"alias_kind":"arxiv_version","alias_value":"2010.04572v1","created_at":"2026-07-05T02:13:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2010.04572","created_at":"2026-07-05T02:13:51Z"},{"alias_kind":"pith_short_12","alias_value":"NUZTNRCUHN75","created_at":"2026-07-05T02:13:51Z"},{"alias_kind":"pith_short_16","alias_value":"NUZTNRCUHN75L6GJ","created_at":"2026-07-05T02:13:51Z"},{"alias_kind":"pith_short_8","alias_value":"NUZTNRCU","created_at":"2026-07-05T02:13:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:NUZTNRCUHN75L6GJIAP5GB6EDV","target":"record","payload":{"canonical_record":{"source":{"id":"2010.04572","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2020-10-09T13:37:45Z","cross_cats_sorted":["physics.comp-ph"],"title_canon_sha256":"22ef0ee7ccb1a2e9fdadcbcd333c080daaa06237032fc3b4c5fc5303ada47cc4","abstract_canon_sha256":"5cbb290c3bc2806e25eceaedab039766609bdc1f598b43d8af9effa7eeaaa04b"},"schema_version":"1.0"},"canonical_sha256":"6d3336c4543b7fd5f8c9401fd307c41d7779323020095a071f41ffa7d5e4eead","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:13:51.520685Z","signature_b64":"Xvzp7P7EHxfV9TMkOOMP3ogFs5MdRcWM2oUfrhBjfdyGKKXpb3KhVRchilw44edpNT3ccS/Lu/98Q6DS1e1vBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6d3336c4543b7fd5f8c9401fd307c41d7779323020095a071f41ffa7d5e4eead","last_reissued_at":"2026-07-05T02:13:51.520200Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:13:51.520200Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2010.04572","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:13:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eH+qHwWZahZ04TNYEddwNE1GVwdsxzyvZfKzdxLXTgnPSVOY118uJLlpTgei4G0JRPS4aXUuy+lzSlcyimh9Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T03:33:20.536458Z"},"content_sha256":"25464dcafe230e81e9612d9e775f7328e9b636c134a023e0b971a3e50ee9aada","schema_version":"1.0","event_id":"sha256:25464dcafe230e81e9612d9e775f7328e9b636c134a023e0b971a3e50ee9aada"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:NUZTNRCUHN75L6GJIAP5GB6EDV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nevanlinna Analytical Continuation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.comp-ph"],"primary_cat":"cond-mat.str-el","authors_text":"Chia-Nan Yeh, Emanuel Gull, Jiani Fei","submitted_at":"2020-10-09T13:37:45Z","abstract_excerpt":"Simulations of finite temperature quantum systems provide imaginary frequency Green's functions that correspond one-to-one to experimentally measurable real-frequency spectral functions. However, due to the bad conditioning of the continuation transform from imaginary to real frequencies, established methods tend to either wash out spectral features at high frequencies or produce spectral functions with unphysical negative parts. Here, we show that explicitly respecting the analytic `Nevanlinna' structure of the Green's function leads to intrinsically positive and normalized spectral functions"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2010.04572","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2010.04572/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:13:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qt3vlP64+X/LiluXlymb7RCDghJ1hJ/20ZZp2Rm77VU7ylqWPSRThuhrTGji0DnGeglAESyjh7+GWerdNCodDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T03:33:20.537358Z"},"content_sha256":"86275851d5106cfb7fd7c6ede6c7326aa75b510801da95b63dce2693c3ec67b2","schema_version":"1.0","event_id":"sha256:86275851d5106cfb7fd7c6ede6c7326aa75b510801da95b63dce2693c3ec67b2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NUZTNRCUHN75L6GJIAP5GB6EDV/bundle.json","state_url":"https://pith.science/pith/NUZTNRCUHN75L6GJIAP5GB6EDV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NUZTNRCUHN75L6GJIAP5GB6EDV/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-22T03:33:20Z","links":{"resolver":"https://pith.science/pith/NUZTNRCUHN75L6GJIAP5GB6EDV","bundle":"https://pith.science/pith/NUZTNRCUHN75L6GJIAP5GB6EDV/bundle.json","state":"https://pith.science/pith/NUZTNRCUHN75L6GJIAP5GB6EDV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NUZTNRCUHN75L6GJIAP5GB6EDV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:NUZTNRCUHN75L6GJIAP5GB6EDV","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"5cbb290c3bc2806e25eceaedab039766609bdc1f598b43d8af9effa7eeaaa04b","cross_cats_sorted":["physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2020-10-09T13:37:45Z","title_canon_sha256":"22ef0ee7ccb1a2e9fdadcbcd333c080daaa06237032fc3b4c5fc5303ada47cc4"},"schema_version":"1.0","source":{"id":"2010.04572","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2010.04572","created_at":"2026-07-05T02:13:51Z"},{"alias_kind":"arxiv_version","alias_value":"2010.04572v1","created_at":"2026-07-05T02:13:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2010.04572","created_at":"2026-07-05T02:13:51Z"},{"alias_kind":"pith_short_12","alias_value":"NUZTNRCUHN75","created_at":"2026-07-05T02:13:51Z"},{"alias_kind":"pith_short_16","alias_value":"NUZTNRCUHN75L6GJ","created_at":"2026-07-05T02:13:51Z"},{"alias_kind":"pith_short_8","alias_value":"NUZTNRCU","created_at":"2026-07-05T02:13:51Z"}],"graph_snapshots":[{"event_id":"sha256:86275851d5106cfb7fd7c6ede6c7326aa75b510801da95b63dce2693c3ec67b2","target":"graph","created_at":"2026-07-05T02:13:51Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2010.04572/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Simulations of finite temperature quantum systems provide imaginary frequency Green's functions that correspond one-to-one to experimentally measurable real-frequency spectral functions. However, due to the bad conditioning of the continuation transform from imaginary to real frequencies, established methods tend to either wash out spectral features at high frequencies or produce spectral functions with unphysical negative parts. Here, we show that explicitly respecting the analytic `Nevanlinna' structure of the Green's function leads to intrinsically positive and normalized spectral functions","authors_text":"Chia-Nan Yeh, Emanuel Gull, Jiani Fei","cross_cats":["physics.comp-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2020-10-09T13:37:45Z","title":"Nevanlinna Analytical Continuation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2010.04572","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:25464dcafe230e81e9612d9e775f7328e9b636c134a023e0b971a3e50ee9aada","target":"record","created_at":"2026-07-05T02:13:51Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"5cbb290c3bc2806e25eceaedab039766609bdc1f598b43d8af9effa7eeaaa04b","cross_cats_sorted":["physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2020-10-09T13:37:45Z","title_canon_sha256":"22ef0ee7ccb1a2e9fdadcbcd333c080daaa06237032fc3b4c5fc5303ada47cc4"},"schema_version":"1.0","source":{"id":"2010.04572","kind":"arxiv","version":1}},"canonical_sha256":"6d3336c4543b7fd5f8c9401fd307c41d7779323020095a071f41ffa7d5e4eead","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6d3336c4543b7fd5f8c9401fd307c41d7779323020095a071f41ffa7d5e4eead","first_computed_at":"2026-07-05T02:13:51.520200Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:13:51.520200Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Xvzp7P7EHxfV9TMkOOMP3ogFs5MdRcWM2oUfrhBjfdyGKKXpb3KhVRchilw44edpNT3ccS/Lu/98Q6DS1e1vBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:13:51.520685Z","signed_message":"canonical_sha256_bytes"},"source_id":"2010.04572","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:25464dcafe230e81e9612d9e775f7328e9b636c134a023e0b971a3e50ee9aada","sha256:86275851d5106cfb7fd7c6ede6c7326aa75b510801da95b63dce2693c3ec67b2"],"state_sha256":"8e73b4b8d38befa33e7150eb8adfbaebb7b1613af46c9d5dd254d13670607fee"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6ZRIcfenNeokzdpafXeoYOJQFZAF5/huLeALkQ7k9VDLDSQbwKfe8yNKcQCOWHhW/6kyYkmQrloOw9J2DZ7pAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T03:33:20.544175Z","bundle_sha256":"e4fea1ba2644dcde2a974f9429c7855c14da2ee31d2e76a5267f8b87efcd09b1"}}